title: Effect of combined nitrogen sources on heterotrophic growth of a blue-green alga Westiellopsis prolifica.
abstract: The autotrophic and photoheterotrophic growth of light pre-treated and dark pre-treated strains of Westiellopsis prolifica was decreased in the presence of NH4+, NO3-- and urea in the culture medium. On dark incubation, after pre-treatment with light as well as in the dark, the alga showed better growth response to all the combined nitrogen sources. However, only the light pre-treated strain of the organism utilized the exogenous nitrogen sources appreciably for its dark heterotrophic growth.
mesh_terms: D000643:Ammonium Chloride / Q000378:metabolism; D003470:Culture Media; D000458:Cyanobacteria / Q000254:growth & development* / Q000378:metabolism; D003624:Darkness; D005632:Fructose / Q000378:metabolism; D008027:Light; D009566:Nitrates / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism*; D017680:Potassium Compounds; D014508:Urea / Q000378:metabolism
chemical_list: D003470:Culture Media; D009566:Nitrates; D017680:Potassium Compounds; D000643:Ammonium Chloride; D005632:Fructose; D014508:Urea; D009584:Nitrogen; C023844:potassium nitrate